[U-Boot] [PATCH 3/4] usb: xhci-dwc3: Add USB2 PHY configuration

[Mark Kettenis]

Configure USB2 PHY register based on "phy_type" property and
handle all the quirks that are relevant for Rockchip RK3399 SoCs.

Signed-off-by: Mark Kettenis <kettenis at openbsd.org>
---
 drivers/usb/host/xhci-dwc3.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index 83b9f119e7..ed955dc8b8 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -118,6 +118,8 @@ static int xhci_dwc3_probe(struct udevice *dev)
 	struct dwc3 *dwc3_reg;
 	enum usb_dr_mode dr_mode;
 	struct xhci_dwc3_platdata *plat = dev_get_platdata(dev);
+	const char *phy;
+	u32 reg;
 	int ret;
 
 	hccr = (struct xhci_hccr *)((uintptr_t)dev_read_addr(dev));
@@ -132,6 +134,24 @@ static int xhci_dwc3_probe(struct udevice *dev)
 
 	dwc3_core_init(dwc3_reg);
 
+	/* Set dwc3 usb2 phy config */
+	reg = readl(&dwc3_reg->g_usb2phycfg[0]);
+
+	phy = dev_read_string(dev, "phy_type");
+	if (phy && strcmp(phy, "utmi_wide") == 0) {
+		reg |= DWC3_GUSB2PHYCFG_PHYIF;
+		reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
+		reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT;
+	}
+
+	if (dev_read_bool(dev, "snps,dis-enblslpm-quirk"))
+		reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
+
+	if (dev_read_bool(dev, "snps,dis-u2-freeclk-exists-quirk"))
+		reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
+
+	writel(reg, &dwc3_reg->g_usb2phycfg[0]);
+
 	dr_mode = usb_get_dr_mode(dev_of_offset(dev));
 	if (dr_mode == USB_DR_MODE_UNKNOWN)
 		/* by default set dual role mode to HOST */
-- 
2.21.0